https://scholars.lib.ntu.edu.tw/handle/123456789/424996
標題: | Toughening Behavior in Ceramics and Cermets | 作者: | Becher P.F. Sun E.Y. Hsueh C.H. Plucknett K.P. Kim H.D. Hirao K. Brito M.E. CHUN-HWAY HSUEH |
關鍵字: | Carbide;Nickel Aluminide-Bonded;Self-Reinforced;Silicon Nitride;Strength;Toughness | 公開日期: | 1999 | 卷: | 161-163 | 起(迄)頁: | 285-290 | 來源出版物: | Key Engineering Materials | 摘要: | The development of high strength (? 1 GPa), high toughness (? 10 MPa¡Ôm) ceramic systems is being examined using two approaches. In silicon nitride, toughening is achieved by the introduction of large prismatic shaped grains dispersed in a fine grain matrix. For the system examined herein, both the microstructure and the composition must be controlled. A distinctly bimodal distribution of grain diameters combined with controlled yttria to alumina ratio in additives to promote interfacial debonding is required. Using a cermet approach, ductile Ni3Al-bonded TiC exhibited toughening due to plastic deformation within the Ni3Al binder phase assisted by interfacial debonding and cleavage of TiC grains. The TiC-Ni3Al cermets have toughness values equal to those of the WC-Co cermets. Furthermore, the TiC-Ni3Al cermets exhibit high strengths that are retained in air to temperatures of ? 1000¢XC. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/424996 | ISSN: | 10139826 |
顯示於: | 材料科學與工程學系 |
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